Datasetpublic

MAC-deepinquiry/verified-facts-sample-500

DeepInquiry Verified Facts (Sample-500) A 500-fact sample of the DeepInquiry verified-facts corpus. Each fact is a single factual statement that has been checked against several sources that do not copy one another, and each record carries the sources behind it. The full corpus holds roughly 3,000 approved facts and grows every day. It is available by API and as a licensed dataset (see Full corpus). What is in the sample 500 facts: 482 Gold and 18 Silver. 11… See the full description on the dataset page: https://huggingface.co/datasets/MAC-deepinquiry/verified-facts-sample-500.

sourceHugging Facecc-by-nc-4.0updated 11d agoView on Hugging Face

1likes54downloads

Dataset Card

DeepInquiry Verified Facts (Sample-500)

A 500-fact sample of the DeepInquiry verified-facts corpus. Each fact is a single factual statement that has been checked against several sources that do not copy one another, and each record carries the sources behind it.

The full corpus holds roughly 3,000 approved facts and grows every day. It is available by API and as a licensed dataset (see Full corpus).

What is in the sample

—500 facts: 482 Gold and 18 Silver.
—11 categories: science (188), history (144), world events (40), technology (36), nature (35), culture (25), other (14), psychology (10), space (4), geography (2), mathematics (2).
—2,544 cited sources, a median of 5 per fact.
—Every record links to the fact's public page on deepinquiry.ai.
—Near-duplicate statements were removed so that each fact covers a distinct subject.

Files

File	Format	Rows
`data/train.jsonl`	One JSON record per line, with a `sources` list	500
`data/train.csv`	Flat table; source URLs joined with ` \	`	500

Fields

Field	Type	Description
`id`	int	Stable identifier of the fact in the DeepInquiry corpus
`fact_text`	string	The fact, as one statement
`category`	string	Subject category
`era`	string	Period the fact concerns
`region`	string	Geographic scope
`verification_tier`	string	`gold` or `silver` (see below)
`independence_score`	float	0 to 1; how independent the supporting sources are from one another
`cluster_count`	int	Number of independent source groups supporting the fact
`surprise_score`	int	1 to 10; how unexpected the fact is to a general reader
`confidence_level`	string	`high`, `medium` or `low`
`url`	string	The fact's public page
`sources`	list	`{url, title}` for each cited source (JSONL only)

How facts are verified

DeepInquiry does not count sources; it counts independent evidence. Sources are grouped by the evidence they trace back to, so two hundred outlets reprinting one wire story count once. Wikipedia, its mirrors and content aggregators are excluded from the corroborating set whenever an original source is available. A fact is graded Gold, Silver or Bronze by how much independent evidence stands behind it. The full method is published at deepinquiry.ai/methodology.

Intended uses

—Grounding and evaluation for retrieval-augmented generation.
—Research on fact-checking and source independence.
—Reference content for education, quiz and trivia products (non-commercial use under this sample's license).

Limitations

—A Gold grade means independent sources agreed when the fact was checked. It is not a guarantee; sources can be wrong, and knowledge changes.
—English only. The corpus leans toward science and history, and toward sources published in North America and Europe.
—This sample was drawn on 29 September 2026. Facts in the live corpus may since have been revised or withdrawn.
—The sample contains no personal data about private individuals.

License

This sample is released under Creative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0). It may be used, shared and adapted for non-commercial purposes with attribution:

DeepInquiry Verified Facts (Sample-500), Machine Accountability Corporation, CC BY-NC 4.0. https://huggingface.co/datasets/MAC-deepinquiry/verified-facts-sample-500

Commercial use, including product integration and AI model training, requires a DeepInquiry license. The cited source pages remain the property of their publishers.

Full corpus

—API: free tier of 2,500 requests per month; paid plans from $59 per month. deepinquiry.ai/pricing
—Data license: the full corpus with sources, quality grades and regular updates, for research, commercial and enterprise use. deepinquiry.ai/data-license
—Contact: hello@deepinquiry.ai

Citation

bibtex

@misc{deepinquiry_sample_500,
  author       = {{Machine Accountability Corporation}},
  title        = {DeepInquiry Verified Facts (Sample-500)},
  year         = {2026},
  publisher    = {Hugging Face},
  howpublished = {\url{https://huggingface.co/datasets/MAC-deepinquiry/verified-facts-sample-500}}
}